Successfully complete the indicated task to unlock the corresponding bonus:

After Hours: Break three rides by flipping their levers. 
Hard Clown Toss: Get a gold medal in Normal Clown Toss. 
Hard Hot 'N Cold: Get a gold medal in Normal Hot 'N Cold. 
Painful Clown Toss: Get a gold medal in Hard Clown Toss. 
Painful Hot 'N Cold: Get a gold medal in Hard Hot 'N Cold. 
Platinum Club Clown Toss: Get a platinum medal on all Clown Toss difficulties. 
Platinum Club Hot 'N Cold: Get a platinum medal on all Hot 'N Cold difficulties.